The International Society for the Philosophy of Architecture has managed to bring together 500+ contributors since 2009. Having held its first symposium in 2010, successful conferences at Newcastle University, UK 2012, TU Delft, Netherlands 2014, and University of Bamberg, Germany 2016, ISPA has become the preeminent established organization in the field. With numerous upcoming events planned across Europe and North America, the society continues to actively engage philosophers and architects in the cultivation of architecture philosophy as a field of enquiry. -- The society invites participants that probe philosophical questions in architecture, or re-draw the assumptions behind them. It welcomes architects and philosophers willing to scrutinize extant (inter)disciplinary boundaries and consensus on questions in architecture philosophy. We celebrate attempts to operate at the intersection of both disciplines, and promote work ready to give philosophy and architect(ure)s respectful and serious consideration alike. We especially welcome individuals contributing to diversity and equal opportunity in scholarly research.